Clock phase adjustment between duplicated clock circuits

Details Clock phase adjustment between duplicated clock circuits Clock phase adjustment between duplicated clock circuits

1992-12-10

1994-09-13

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 72, 328155, 307262, H03K 700, H03K 1700

Patent

active

053472276

ABSTRACT:
Cross coupling framing signals between two timing subsystems to adjust the phase relationship between the timing subsystems. In a standby timing system, framing signal of the standby timing system is used to start a counter, and framing signal of the active timing subsystem is used to stop the counter. The delay due to drivers, receivers and interconnecting cables is made to be an integer number of counts (nominal count) of the counter. Any difference between the contents of the counter and the nominal count represents the difference in phase between the standby timing subsystem and the active timing subsystem. The standby timing subsystem is adjusted to eliminate this phase difference by eliminating the difference between the nominal count and the contents of the counter.

REFERENCES:
patent: 3803568 (1974-04-01), Higashide
patent: 4156200 (1979-05-01), Gomez
patent: 4494211 (1985-01-01), Schwartz
patent: 4982110 (1991-01-01), Yokogawa et al.
patent: 5022050 (1991-06-01), Tanaka
patent: 5052028 (1991-09-01), Zwack
patent: 5146585 (1992-09-01), Smith, III
patent: 5150068 (1992-09-01), Kawashima et al.
patent: 5239562 (1993-08-01), Grimes

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